Ankle exercise device



FIG. 1 is a front perspective view of the ankle exercise device showing our new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is a side elevation view of the ankle exercise device in use in an upright position; and,

FIG. 9 is a side elevation view of the ankle exercise device in use in a supine position.

The broken lines shown in the drawings illustrate portions of the ankle exercise device that form no part of the claimed design.

The broken lines in FIGS. 8 and 9 showing the ankle exercise device in use illustrates environment and forms no part of the claim. 

CLAIM The ornamental design for an ankle exercise device, as shown and described. 